The BMW N45 was an inline four-cylinder petrol engine that was first released in 2003. The N45 was a revised version of the N40 engine.
The N45 engine had an aluminium alloy block and cylinder head, two gear-driven balance shafts, sequential fuel injection, double overhead camshafts (chain-driven), variable intake and exhaust valve timing (BMW’s double VANOS), four valves per cylinder and a maximum engine speed of 6500rpm. The N45 engine, however, did not have Valvetronic.
| Engine | Capacity | Peak power | Peak torque | Models | Years |
|---|---|---|---|---|---|
| N45B16 | 1596 cc (84.0 x 72.0) |
85kW at 6000rpm | 150Nm at 4300rpm | E46 316Ci | 2003-06 |
| E46 316ti | 2003-06 | ||||
| E87 116i | 2004-07 | ||||
| E90 316i | 2005-07 | ||||
| N45NB16 | 1596 cc (84.0 x 72.0) |
85kW at 6000rpm | 150Nm at 4300rpm | E87 116i | 2007-12 |
| E90 316i | 2007-11 |
